Vallahir Wildclaw

: Vallahir Wildclaw is a 6/6 Barbarian creature with trample that's still a planeswalker. Prevent all damage that would be dealt to him this turn.
-1: Put a +1/+1 counter on target creature you control if it's a Ragebeast. Then it fights target creature an opponent controls.
-4: Creatures you control get +3/+3 until end of turn. At the beginning of the next end step, transform Vallahir and sacrifice all Ragebeasts.